For a National Geographic documentary, producer Peter Chinn used a combination of dimensional ultrasound scans, tiny cameras, and computer graphics to create the following images of baby animals. (WARNING: graphic images inside!)

The special will document the progress of growth inside the womb, from conception to birth. Mother nature at its finest. I must say, I have a great new appreciation for female elephants — who'd have guessed that an elephant would be so fully formed inside of its mother?